Frame-based adaptive uplink scheduling algorithm in orthogonal frequency division multiple access-based Worldwide Interoperability for Microwave Access networks

Authors:
Bor-Jiunn Hwang;I-Shyan Hwang;Chih-Wei Huang
Affiliations:
Department of Computer and Communication Engineering, Ming-Chuan University, Tao-Yuan, Taiwan33348;Department of Computer Science and Engineering, Yuan-Ze University, Chung-Li, Taiwan32003;Department of Computer Science and Engineering, Yuan-Ze University, Chung-Li, Taiwan32003
Venue:
International Journal of Communication Systems
Year:
2012

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Abstract

Because the orthogonal frequency division multiple access physical resource available for scheduling in Worldwide Interoperability for Microwave Access networks is frame by frame, an uplink scheduler located at the base station must efficiently allocate available resources to the subscriber stations in response to constant or bursty data traffic on a per-frame basis. Available resources for real-time and nonreal-time traffics, called frame-based adaptive bandwidth allocation and minimum guarantee and weight-based bandwidth allocation, respectively, are proposed in this paper. Moreover, both short-term and long-term bandwidth predictions for traffic are incorporated so that the long-term bandwidth prediction can have sustainable throughput requirement, and the short-term bandwidth prediction can meet the objectives of low delay and jitter. For the scenarios studied, it shows that system performance of the proposed algorithm is better than the hybrid (earliest deadline first + weighted fair queuing + FIFO) algorithm in terms of packet delay, jitter, throughput, and fairness. Copyright © 2011 John Wiley & Sons, Ltd.